Friction-clutch.



J. M. KROYEK. FRICTION CLUTCH. APPLICATION FILED JUNE 14, 1909.

anmmtoz Patented Dec. 21, 1909.

wi limcooev Q4 fUNITED STATES PATENT OFFICE.

JOHN M. KROYER, 0F STOCKTON, CALIFORNIA, ASSIGNOR T0 SAMSON TRON WORKS, 015

' STOCKTON, CALIFORNIA, A CORPORATION.

FRICTION-CLUTCH.

Specification Of LClZ'tCIS Patent.

Application filed June 14, 1909.

Patented Dec. 21, 1909.

Serial No. 502,029.

To all whom 'it may concern:

Be it known that I, JOHN M. Knoi'an, a

citizen of the United States, residing at Stockton, in-the county of San Joaquin,

vState of California, have invented certain new and useful Improvements in Friction- Clutches; and I do declare the following to be a full, clear, and exact description of the same,.such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the characters of reference marked thereon, which form a part of this application.

This inventlon relates to improvements in clutches for driving means and particularly to friction clutches known as the friction ring type, the object of the invention being to produce a clutch in which the direct for- Ward clutch ring is expanded by driving the free ends of the same upward and outward instead of downward and outward, and thus the friction is entirely even throughout the entire periphery of the friction ring and there is no danger of the'ends becoming bent or worn and also a greater and better friction surface is presented to the main driving drum.

A further object of the invention is to produce such a friction clutch as will be simple ofconstruction and yet highl efficient' for the purposes for which .t is designed. I

These ob'ccts I accomplish by means of the usual riction drum having within its inner periphery a friction ring split at one point, there being de ending lugs at each end of said ring to w ich are pivoted friction dogs, such friction dogs crossing each other and having a mutual contact point at a point in a lower plane than the plane of the centers of their pivotal points on said lugs, whereby when said lugs are expanded at their lower ends by the shifting ring, their upper ends will move said friction rin' first outward and then, by reason of sai contact points, upward against the, said friction drum and thus the contact between said friction drum and ring will have an even and uniform effect, thus giving a greaterdegree of resisting power, since i i most internal clutches, the open ends of the friction ring are moved downward'and outwardinstead of upward and outward as; 1n mine,

and hence-such ends are liable ,to become I also employ such other and furtherstructure and relative arrangement of parts as will more fully appear by a perusal of the following specification and claims.

In the drawings similar characters of reference indicate corresponding parts in the several views. a

Figure 1 is a front elevation of a friction drum showing-Toy improved forward drive friction ring lnstalled therein. Fig. 2 is a sectional view taken on a line m-m of Fig. 1, with the shifting cam not shown. Fig. 3 is a front elevation of a friction dog.

Referring now more particularly to the characters of reference on the drawings 1 designates the friction drum which 'may be driven by the usual planetary or other driving means but for the purposes of this description. I will presume the same to be of formed, as a part thereof, the direct drive friction ring 5 which ring is but one continuous member split at one point a instead of at two points as in the usual form of friction clutch.

At each end of the ring 5 are depending lugs 6 pivoted to which are the friction dogs 7, such dogs crossing each other as at b such dogs havin mutual contacting surfaces 8 at a point below the plane of the pivotal points (5, whereby when the dogs 7 are s read apart by the shifting cam 9, the surfaces 8 im 0 of said dogs 7 and said lugs' pinge one against the other and this, instead of to lugs 13 on the ring 5 whereby when the.

cum 9 is released from the dogs 7 said sprin acts to,release said ring 5 from contact wit 1 the drum 1'.

The type of clutch sho'wn being the usual planetary type, the band 14 is the usual band used to hold the drum stationary While the internal gear of the clutch perform their Operation in the-usual manner to give a reverse operation. This mechanism is old and well known hence I'have not here shown it in detail. I

From the foregoing description it will be readily seen that I have produced such a friction clutch as substantially fulfils the objects of the invention as set forth herein.

\Vhile this specification sets forth in detail the present and preferred construction of the device, still in practice such deviations from such detail, may be resorted to as do not form a departure from the spirit of the invention.

Having thus described my invention what I claim as new and useful and desire to secure by Letters Patent is 1. A frictionclutch comprising a friction drum, an internal friction ring split at one point, levers fulcrumed t0 the free ends of said -ring and crossing each other, a lug on the inner side of each lever, such lugs bein'g opposed and normally impinging one upon the other in a plane lower than the pivotal points of said levers and said ring.

2. A friction clutch comprising a friction drum, an internal friction ring split at one point and levers pivoted to the free ends of said ring, said levers having mutual contact points in a plane lower than the plane of the pivotal points of said levers and said ring, said levers crossing each other at a point below said contact points, as described.

In testimony whereof I afiix my signature in presence of two Witnesses.

JOHN M. KROYER.

, \Vitnesses PERCY S. \VEns'rnR, WM B. GRIFFIN. 

